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comparison src/joystick/android/SDL_sysjoystick.c @ 4721:7bb9d3a3f257

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Added accelerometer 'joystick'
author Paul Hunkin <paul@bieh.net>
date Tue, 27 Jul 2010 21:20:17 +0200
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children 6a10693e66c3
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4720:80f8d672b52e 4721:7bb9d3a3f257
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2010 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22
23 #include "SDL_config.h"
24
25 #ifdef SDL_JOYSTICK_ANDROID
26
27 /* This is the system specific header for the SDL joystick API */
28 #include <stdio.h> /* For the definition of NULL */
29
30 #include "SDL_error.h"
31 #include "SDL_events.h"
32 #include "SDL_joystick.h"
33 #include "../SDL_sysjoystick.h"
34 #include "../SDL_joystick_c.h"
35
36 extern float fLastAccelerometer[3];
37
38 const char *accelerometerName = "Android accelerometer";
39
40 /* Function to scan the system for joysticks.
41 * This function should set SDL_numjoysticks to the number of available
42 * joysticks. Joystick 0 should be the system default joystick.
43 * It should return 0, or -1 on an unrecoverable fatal error.
44 */
45 int
46 SDL_SYS_JoystickInit(void)
47 {
48 SDL_numjoysticks = 1;
49
50 return (1);
51 }
52
53 /* Function to get the device-dependent name of a joystick */
54 const char *
55 SDL_SYS_JoystickName(int index)
56 {
57 if (!index)
58 return accelerometerName;
59 SDL_SetError("No joystick available with that index");
60 return (NULL);
61 }
62
63 /* Function to open a joystick for use.
64 The joystick to open is specified by the index field of the joystick.
65 This should fill the nbuttons and naxes fields of the joystick structure.
66 It returns 0, or -1 if there is an error.
67 */
68 int
69 SDL_SYS_JoystickOpen(SDL_Joystick * joystick)
70 {
71 joystick->nbuttons = 0;
72 joystick->nhats = 0;
73 joystick->nballs = 0;
74 joystick->naxes = 3;
75 joystick->name = accelerometerName;
76 return 0;
77 }
78
79
80 /* Function to update the state of a joystick - called as a device poll.
81 * This function shouldn't update the joystick structure directly,
82 * but instead should call SDL_PrivateJoystick*() to deliver events
83 * and update joystick device state.
84 */
85 void
86 SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)
87 {
88 int i=0;
89 for(i=0;i<3;i++){
90 SDL_PrivateJoystickAxis(joystick, i, fLastAccelerometer[i]);
91 }
92 }
93
94 /* Function to close a joystick after use */
95 void
96 SDL_SYS_JoystickClose(SDL_Joystick * joystick)
97 {
98 }
99
100 /* Function to perform any system-specific joystick related cleanup */
101 void
102 SDL_SYS_JoystickQuit(void)
103 {
104 }
105
106 #endif /* SDL_JOYSTICK_NDS */